Ok, I've contacted a few friends, and this is what we have come up with colectively:
Here are some Neihoff #s for Cockshutt 20 with Continental F 124 or F 140 with Dist No. IAD-6004-1C. Points # AL 5-23 HV or AL 5-23M,condenser # AL34, rotor #AL 81, and cap # AL 73.
Is the distributor a Prestolite or Autolite with an id tag on it? (Or other make with stamped numbers?)
If you know the distributor make and have some numbers, I can look it up in the Standard Ignition Ag and Industrial cross reference, and get you Standard #'s that many auto supplies can get overnight, or you can cross those numbers at NAPA, or wherever
May also want to contact Phil Heisey in PA...he's usually on the cockshutt board or the Lesser Known Classics board and carries a lot of parts for the Co-Op/Cockshutt tractors.
Get back with us.
Soundguy